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Integers

The value of ...

Question

The value of x if $4 x^{2} - 1 = 0$

A

\pm \frac{1}{2}

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B

\pm \frac{1}{4}

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C

\pm 2

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D

\pm 4

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Solution

The correct option is B $\pm \frac{1}{2}$
$4 x^{2} - 1 = 0 4 x^{2} = 1 x^{2} = \frac{1}{4} x = \sqrt{\frac{1}{4}} x = \pm \frac{1}{2}$

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